Duplex tracker-board for automatic musical instruments.



, A M. CLARK.

DUPLEX TRACKER BOARD FOR AUTOMATIG MUSICAL INSTRUMENTS.

Patented Mar. 9, 1909.

APPLICATION FILED NOV.6,1908. r

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1 0 52 .2 I, 7 1 .efo 0 Kh- I! w/mfssrs- INVENTOI? MELVILLE CLARK, or CHICAGO, ILLINQIS.

DUPLEX TRACKER-BOARD FOR AUTOMATIC MUSICAL INSTRUIVEENTS;

Specification of Letters Patent.

Patented March 9, 1909.

Original application filed February 14, 1907, Serial No. 357,318. Divided and this application filed November 6, 1908;

i Serial No. 461,264. 7

To all whom, it may concern:

Be it known that I, MELVILLE CLARK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinols, have invented new and useful Improvements in Duplex Tracker-Boards for Automatic Musical Instruments, of which the following is a specification, reference being had to the drawings forming a part thereof.

This application is a division of my original application No. 357,318, filed February 14, 1907.

. It relates to one of the modifications shown in-that ap lication, in which the claims were directe to a different modification.

The purpose of theinvention is to provide an improved tracker board construction for automatic musical instruments or players by I which such instruments may be adapted to employ controlling sheets having their perforations out according to different scales, that is spaced more or less widely from center to center of the perforations.

It consists of the'features and construction herein shown and described as indicated in the claims.

In the drawings:-Figure 1 is an edge ele-. vation of a tracker board device embodying this invention. aft section of the same.

the line 33 on Fig. 2.

The tracker device which embodies this invention as shown in the drawings consists Fig. 3 is a section at of a tracker board comprising two members,

1 and 2, joined so as to be rigid with each other and meeting at their forward edges,

from which they diverge rearwardly for admission between them of a third member, 3, which is fixed between. them, being beveled onits edges for abutting snugly upon the oppositely facing or inner surfaces of the two members, 1 and 2, b ack of their meeting line, and provided with guides, 5, 5, between which said member, 3, is adapted to slide longitudinally of the, members, 1 and 2.

The said members, 1 and 2, are preferably secured together for rigidity with each other by an interposed spacer and brace bar, 4, extending longitudinally between the meeting of the two members,

The two members,- 1 and 2, have res eetlv'ely sets of tracker ducts, 6 and 7,'whic at their mouths at. the forward edges of'said Fig. 2 is a vertical fore-and 1 and 2 and the slidingspaced at a distance of about one-sixth 0 an. I

inch from centertmcenter, and those of the member, 2, being sp ced more closely, as, for example, at a distance of about one-tenth of an inch from jcenten, to center. The said ducts, 6 and 7 are led out to the opposed surfaces of said members respectively by the short inwardly ofl set ports, 6, and 7 and areadapted to register with the ports of ducts, 9, in said member, 3, which at one edge of said member have their'ports spaced to agree with the spacing of the pbrts, 6 of the member, 1, and at the opposite edge have their ports spaced to agree with the spacing of the ports, 7 of the member, 2, the ducts 9 thus diverging somewhat from one edge to the other of said member, 3.

. Tubes, 10, 10, leading to the pneumatic action are connected to the ducts, 9, of the member, 3, at any convenient oint intermediate the two lateral edgeso said member. .The duct ports of the ducts, 9, at the opposite edges of said member, 3, are, however, so located that they will not register at the same time with the ports, 6 and 7 of the two members, 1 and 2 respectively; that is to say, when said ports of the ducts, 9, register atone edge with the ports, 6, of the ducts 6 in the member, 1, they'areout of registration with the corresponding ports 7 of the other member, which are therefore closed by the edge of said member, 3,0perating as a valve on the inner face of the member, 2; and, similarly, when the member, 3, is moved longitudinally in its slide bearings on the two members, -1 and 2, sufliciently to cause the ports at the'edge w hich seats on the member, 2, to register with the ports, 7 of that member, the ports at the opfiosite edge. are carried out of registration wit the ports,

6 of the member, 1,, and said ports are closed by the edge of the member, 3, operating as a valve on the inner face of said member, 1. Either set of tracker ducts may therefore be brought into operative connection with the pneumatic action by adjusting the member, 3, one way or the other for registration of its duct ports atone edge'of said member or the other with the ports on the member against which it bears at'that edge. A convenient means'for-such adjustment consists of the lever, 12, which may be fulcrumed u on either of-the members, and which P trated as fulcrumed upon the member, 2, projecting upward so as to be within reach of the operator. The stops, 13, on the lower member, 1, limit the throw of the member, 3

said element which face in oppositedirec ti'ons', the other element having two sets of element being relatively disposed on said elements respectively sothat only oneset of ports of oneelement' can register at a time with the corresponding set of-ports of the to osed between said two oppositely facing s" aces of'the first element and movable thereon to shift'the-registration of its ports *with said sets of ports of the other element. 2, In an -automatie'music playmg instru-v vment,-a tracker device com rising two elements, one of said elements aving two sets 'of-tracker ducts terminating in a tracker mouth edge at which the mouths of said two vsets of ducts arediflerently spaced, the ducts of said two sets being extended from their said tracker mouths to and having their respective series. of ports opening at op ositely facing areas of the surface of said 0 e'ment, a second element cooperating with said first element having a series of ducts each provided with two ports at suifaces' of saidsecond element adapted to bear upon saidinstruduct ports, said ports of the first and second other element, said second element being intwo oppositely facing surfaces of the first element, the said two sets of ports of said second element and the twosets of orts of eing relatively movable to' shift such regis-- tration at will from one set to the other.

3. 'In an automatic music-playing instru- -ment, a tracker device com rlsing an ele-- ment consis'tin of two duct oards meetin at one edge an diverging from such edge an rigidly secured together, having respectively sets of tracker ducts differently spaced at the tracker edge, and having corresponding series of ports 0 ening through oppositely facing surfaces 0 said duct boards respectively;-.a duct element whose ducts have terminal months or ports 0 ening through opposltely facing edges 0 said member and adapted to register respectively withthe two sets of'ports of said two duct. boards, said ports of'the second element and ports ofthe rst element being relatively disposed on said two elements so that only-one set of duct ports of either member can register at a time,

and means for shifting said second element at will topha'nge the re 'stration,

- In testimony whereo I have hereunto set my hand in the presence of two Witnesses, at

Chicago,- Illinois, this2d day of November,

' MELVILLE CLARK;

In the presence of JULIA S. ABBOTT, M. GERTRUDE ADY. 

